Rim-operating tool



L. H. PERLMAN.

RIM OPERATING TOOL.

APPLICATION FILED FEB. 23. 1911.

1,388,194, Patented Aug. 23, 1921.

) 51w 211 lb t Mam r I crlxm UNITED STATES PATENT OFFICE.

LOU-I8 H. rmunr, NEW YORK, N. Y., ASSIGNOR TO GENERAL MOTORS CORPO- BATION, A CORPORATION OF DELAWARE.

RIM-OPERATING TOOL.

Specification of Iatters lfatent.

Patented Aug. 23, 1921.

To all ruzhom it may concern Be it known that I, LOUIS H. PEBLMAN, a

. citizen of the United States, residing at New such a mm.

Thefobject in view is the provision of means for facilitating manual manipulation of a rim for expediting and reducing the labor of mounting a tire on a cross cut demountable rim and removing a tire therefrom.

With this and further objects in view as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subsequently specified and claimed.

In,the accompanying drawing Figure 1 is a plan view of a tool embodying the features of the present invention and shown as applied and in its position just prior to the beginning of an operation of manipulating a rim.

Fig. 2 is a side elevation of the parts seen in F g. 1.

3 is a sectional elevation thereof, the tool having been moved to the rim collapsing position. Fig. 4 is a perspective view of the tool detached with the extension handle omitted.

Fig. 5 is a vertical section of the fulcrum post, parts being seen in elevation, taken on the plane indicated by line 5-5 of Fig. 2.

Fig. 6 is a transverse section taken on the plane indicated by line 6-6 of Fig. 2.

Referring to the drawing by numerals, 1 indicates an operating lever which is pivoted on a shaft 2 and has one of its ends fulcrumed on pivot 3 carried by a post 4. The post 4 is formed in two parts each consisting of a radially extending plate having a right angular outstanding arm 16 at its base for receiving the locking pins 5, 5. The pins 5, 5 may be adjusted in their relative position to each other by means of a series of apertures 17 spaced along the arms 16, 16. A further adjustment of the pins 5, 5, may be obtained by manipulation of the thumb nut 18 threaded on bolt 19 for causing the contraction or permitting the sepa ration of the separate parts of post 4. Pivot 3 is preferably an ordinary bolt loosely passed through the plates of post 4 so as to allow play of said plates when released by the loosening of thumb nut 18. Of course, a greater relative movement of the plates may be obtained by backing off the nut of bolt 3 when nut 18 is loosened.

The shaft 2 is surrounded by sleeves 6, 6, arranged at opposite sides of the lever 1 and servin as spacers therefor. The shaft 2 is provi ed with a head at each end, and between the heads of the shaft and the outer ends of the sleeves 6 are arranged links 7 7, the links being pivoted onto the shaft in a position to swing freely thereon. The free end of each link is bent substantially at right angles and is preferably tapered to form a hook 8. Each hook 8 is relatively straight but as will become afiqparent serves the purpose of an ordinary ook. The links 7 are connected near their free ends by a cross rod 9 having a head at one end engaging one of the links and a nut 10 threaded onto the opposite end portion and engaging the other link. An appropriate washer may be employed between the nut and link as also petliveen the head of rod 9 and the adjacent The tool is adapted for use inconjunction with a cross cut demountable rim, such as seen at 11 in the drawing. Rim 11 is provided with a tongue outstanding from one end and formed with a hook 13 adapted to enter a slot 14 formed in the opposite end of rim 11 for receiving said hook. The flanges of rim 11 at the slotted end are formed with apertures 15 for receiving the hooks 8 of links 7. r

In operation, the rim 11 being in the noncollapsed condition seen in Fig. 1, the pins 5, 5, attached to post 4 are inserted in apertures 24, 24 beneath the flange of rim 11 and secured thereto by tightening the nuts 23, 23, while the lever 1 is disposed to extend in a direction parallel with the rim. The links 7 are then caused to engage the opposite end portion of the rim by having the hooks 8 inserted in the apertures 15 and the nut 3 with a terminal portion 21 adapted to receive a coinplemental operating tool 22 being formed with a socket to snugly receive the portion 21.. 22 to lie outside the planes of the rim 11,

I and offset 20 is preferably of sufiicient grees.

length to leave the handle 22 entirely free of the adjacent edge of the rim so as to facilitate manual manipulation.

The parts being assembled as above described andas seen in Fig. 1, the operator grasping the lever 22 swings the same through an arc of approximately 220 de- The effect of'this movement is to cause the links 7 to travel through such a path as effects first a movement of that end of rim 11 engaged by the links inward to an extent freeing the end from engagement with hook 13, and then to move toward the post 4 until the end portions of the rim are in the lapping position seen in Fig. 3. This movement brings the pivots for links 7 represented by rod 2 below the plane of the pivot '3 and at the opposite side from the position formerly occupied so that the pull of the rim ends incident to the tendency of the rim 11 to assume its former condition is effectively resisted and the parts are locked in their collapsed condition. This collapsing movement results in a reduction in the effective diameter of the rim 11, so that a tire with inextensible marginal beads may be applied or removed without difficulty. :The handle 22 is preferably withdrawn from its engagement with the lever during the application or removal of a tire to or from the rim 11. After a tire is removed and a new tire applied, the rim 11 is expanded to its normal position merely by re-application of the handle 22to lever 21 and a reverse move-. ment of the parts from that producing the collapsed condition of the rim 11. Repeated tests have effectively established the fact that this reverse movement not only returns the rim ends to their former relative position, but automatically applies the slot 14: over the hook 13, and thus restores the The offset 20 enables the handle 2. A fulcrum post for a cross-cut rim manipulating tool comprising radially disposed plates each having an angularly extending arm, each ofthe arms having a series of spaced pin-receiving openings, and

a rim engaging pin extending through one of the openings of each of the arms. I Y a 3. In a manipulating tool for a cross-cut rim, the combination with an operating lever, means connected with the lever for engaging one end portion of a rim for moving such end portion when the lever is moved, and a fulcrum for said lever comprising plates extending on opposite sides of the lever, a pivot connecting the plates to the lever, means for adjusting the plates bodily in spaced relation to each other, and rimengaging means carried by the plates.

4:. In a manipulating tool for a cross-cut rim, the combination with an operating lever, means connectedwith the lever for engaging one end portion of a rim for moving such' end portion when the leveris moved, and a fulcrum for said lever coming bolt connecting the radial plates.

In testimony whereof I affixmy signature in presence of two witnesses. 1 I

ou s H. PERLMAINT. Witnesses:

I. B. Lnnssolv, EDGAR M. KiromN.

prising plates extending on opposite sides '95 plates for an operating lever, and an adjust- I I 

